Benchmark: Lodash cloneDeep VS spread operator VS Lodash clone

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var MyObject = {
  description: 'a',
  myNumber: 123456789,
  myBoolean: true,
};

var myCopy = null;

Tests:

Lodash cloneDeep
myCopy = _.cloneDeep(MyObject);
Spread operator
myCopy = {...MyObject};
Lodash clone
myCopy = _.clone(MyObject);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash cloneDeep
Spread operator
Lodash clone

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Browser/OS: Chrome 128 on Windows

View result in a separate tab

Test name	Executions per second
Lodash cloneDeep	1647593.9 Ops/sec
Spread operator	7082806.5 Ops/sec
Lodash clone	2033810.0 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark definition and test cases.

**Benchmark Definition JSON:**

The benchmark is defined by a JSON object that contains three key components:

* `Script Preparation Code`: This code is executed on the client-side to prepare the environment for the benchmark. In this case, it creates an object `MyObject` with several properties (description, number, and boolean). The `myCopy` variable is initialized as null.
* `Html Preparation Code`: This code is also executed on the client-side to prepare the HTML environment for the benchmark. It includes a script tag that loads the Lodash library version 4.17.5 from a CDN.

**Individual Test Cases:**

The test cases are defined in an array of objects, each representing a single test case. There are three test cases:

1. `Lodash cloneDeep`:
	* The benchmark definition code is `myCopy = _.cloneDeep(MyObject);`
	* This test case uses the `_.cloneDeep()` method from Lodash to create a deep copy of the `MyObject`.
2. `Spread operator`:
	* The benchmark definition code is `myCopy = {...MyObject};`
	* This test case uses the spread operator (`...`) to create a shallow copy of the `MyObject`.
3. `Lodash clone`:
	* The benchmark definition code is `myCopy = _.clone(MyObject);`
	* This test case uses the `_.clone()` method from Lodash to create a shallow copy of the `MyObject`.

**Options Compared:**

The three test cases compare the performance of different approaches for creating a copy of an object:

1. **Lodash cloneDeep**: Creates a deep copy of the object using the `_.cloneDeep()` method.
2. **Spread operator**: Creates a shallow copy of the object using the spread operator (`...`).
3. **Lodash clone**: Creates a shallow copy of the object using the `_.clone()` method.

**Pros and Cons:**

* **Lodash cloneDeep**:
	+ Pros: Creates a deep copy, which is necessary for some data structures that have nested objects.
	+ Cons: Can be slower due to the recursive nature of the deep cloning process.
* **Spread operator**:
	+ Pros: Fast and efficient for shallow copies.
	+ Cons: Does not create a deep copy, which can lead to issues with nested objects or arrays.
* **Lodash clone**:
	+ Pros: Similar performance to the spread operator for shallow copies.
	+ Cons: Does not create a deep copy, similar to the spread operator.

**Library and Purpose:**

The Lodash library is used in all three test cases. It provides utility functions for various tasks, including object manipulation (e.g., `_.cloneDeep()`, `_.clone()`).

**Special JS Feature/Syntax:**

None of the test cases use special JavaScript features or syntax that would require explanation.

**Other Alternatives:**

If you were to create a similar benchmark, you could consider alternative approaches for creating copies of objects:

* Using libraries like Immutable.js, which provides a range of data structures and utilities for immutability.
* Implementing your own custom copying logic using JavaScript's built-in methods (e.g., `Object.assign()`, `Array.prototype.slice()`).
* Utilizing modern JavaScript features like `JSON.parse(JSON.stringify(obj))` or `Object.create(null)`.

Keep in mind that the specific approach chosen would depend on the requirements of your project and the trade-offs between performance, readability, and maintainability.

Related benchmarks:

Lodash cloneDeep VS spread operator VS Lodash clone (version: 0)

Comparing performance of: Lodash cloneDeep vs Spread operator vs Lodash clone

Created: 5 years ago by: Guest

Jump to the latest result

Lodash cloneDeep

Spread operator

Lodash clone

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):